
Scrap Aluminum Crushing Process
Material Inspection and Preparation
Scrap aluminum should be inspected before crushing. Glass, batteries, sealed components, residual oil, large steel attachments and other unsuitable materials should be removed or handled separately.
The incoming material dimensions, thickness, alloy type and attached components must remain within the feeding limits of the selected crusher.
Controlled Feeding
Prepared aluminum scrap is transferred into the crushing chamber by a conveyor or suitable feeding device. The feeding rate should match the material dimensions, bulk density and crusher load.
Long, bundled, compressed or oversized aluminum scrap may require pre-cutting or primary shredding before hammer crushing.
Hammer Crushing
A high-speed rotor drives the hammers to repeatedly impact, deform and break the material inside the crushing chamber. Friction and compression between the hammers, liner plates and screen grate further reduce the aluminum scrap.
Screen-Controlled Discharge
Material that meets the selected screen opening is discharged from the crusher, while oversized pieces remain inside for further crushing.
The actual output depends on the incoming material, hammer configuration, screen opening, feeding rate and aluminum scrap structure.
Magnetic Separation
After crushing, magnetic separation can recover exposed screws, steel inserts, hinges and other ferrous components from the aluminum-rich material stream.
Optional Screening and Material Spreading
Screening can classify different particle-size fractions and remove excessive fines. Material spreading equipment may provide more uniform feeding before subsequent sorting.
Optional Eddy Current Separation
After ferrous metal removal and suitable material preparation, eddy current separation may recover conductive non-ferrous metals from appropriate non-conductive residues.
Eddy current separation does not normally identify different aluminum alloy grades. Additional sorting equipment may be required when different aluminum products must be collected separately.
Optional Airflow Sorting
Airflow sorting may help remove protective film, foam, loose plastic, rubber and other lightweight impurities when sufficient density and aerodynamic differences exist.
Dust Collection and Material Collection
Dust collection can be configured around the crusher, screening equipment and conveyor transfer points according to the material condition and workshop requirements.
Processed aluminum, ferrous material and separated residues are transferred to their respective collection areas according to the selected recycling process.